In the Avengers movie, Tony Stark builds a tower in New York City. It is big, it is shiny, it is tall. It's all the things that Tony Stark loves, especially in his buildings.

During the battle in the third act:

...we see the ground team (Hawkeye, Black Widow, Captain America) are pretty much camped out near Grand Central station. It would seem that Stark Tower isn't too far from there, given that Captain America's primary mission is to keep the Chitauri within a 3 block radius of Grand Central. That leads me to believe the portal (which is above Stark Tower) is located close by, because otherwise the mission objective would be laughable and tactically unwise.

Based on the establishing shots, I was wondering: Where is Stark Tower located? And, furthermore:

I wonder if this is established in actual movie or, preferably, comic canon (via dialogue, text, or other verifiable in-universe evidence), instead of just as a moviemaker's design choice?
– IsziMay 10 '12 at 22:14

Well, the location is pretty obvious; in our universe, the MetLife building totally ruins the view of the Grand Central building looking south on Park Avenue. There's not very many buildings around Grand Central with that same angle.
– AarthiMay 10 '12 at 22:26

You can see it in several scenes, especially during the climactic battle. There's the base of a building, with a ton of construction scaffolding, then above that is the start of Stark Tower.
– user1027May 10 '12 at 22:36

In a shot of lower Manhattan in Doctor Strange, the Avengers' Tower can be seen very clearly. In relation to the Empire State Building and Rockefeller Center, the tower seems to be near or on the corner of Park Ave and 44th St. with the iconic "A" logo facing North and Grand Central Station behind it; I do not know if they are supposed to be connected buildings or not.

I actually did find an address: Tony and Pepper have a listed address of 200 Park Ave, which is pretty much exactly where I guessed it to be...